{"id":"GHSA-2557-x9mg-76w8","summary":"ASA-2024-002: Default `PrepareProposalHandler` may produce invalid proposals when used with default `SenderNonceMempool`","details":"## ASA-2024-002: Default `PrepareProposalHandler` may produce invalid proposals when used with default `SenderNonceMempool`\n\n**Component**: Cosmos SDK\n**Criticality**: Medium\n**Affected** Versions: Cosmos SDK versions \u003c= 0.50.3; \u003c= 0.47.8\n**Affected** Users: Chain developers, Validator and Node operators\n**Impact**: Denial of Service\n\n## Summary\n\nWhen using the default `PrepareProposalHandler` and the default `SenderNonceMempool`, an issue was identified which may allow invalid blocks to be proposed when a single sender includes multiple transactions with non-sequential sequence numbers in certain conditions. If this state is reached, it can lead to a reduction in block production for a network.\n\n## Next Steps for Impacted Parties\n\nIf you are a chain developer on an affected version of the Cosmos SDK, it is advised to update to the latest available version of the Cosmos SDK for your project.  Once a patched version is available, it is recommended that network operators upgrade.\n\nA Github Security Advisory for this issue is available in the Cosmos-SDK [repository](https://github.com/cosmos/cosmos-sdk/security/advisories). For more information about Cosmos SDK, see https://docs.cosmos.network/.\n\nThis issue was found by [KonradStaniec](https://github.com/KonradStaniec), [gitferry](https://github.com/gitferry), [SebastianElvis](https://github.com/SebastianElvis), and [vitsalis](https://github.com/vitsalis) who reported it to the Cosmos Bug Bounty Program on HackerOne on January 16, 2024. If you believe you have found a bug in the Interchain Stack or would like to contribute to the program by reporting a bug, please see https://hackerone.com/cosmos.\n","aliases":["GO-2024-2571"],"modified":"2024-05-23T18:32:11Z","published":"2024-02-21T00:13:46Z","database_specific":{"nvd_published_at":null,"cwe_ids":["CWE-1285"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2024-02-21T00:13:46Z"},"references":[{"type":"WEB","url":"https://github.com/cosmos/cosmos-sdk/security/advisories/GHSA-2557-x9mg-76w8"},{"type":"WEB","url":"https://github.com/cosmos/cosmos-sdk/commit/c05850241e2d615721e3492d15fee4e1deec082b"},{"type":"WEB","url":"https://github.com/cosmos/cosmos-sdk/commit/fe32bcc1d65412c9b5737672956f0638c729ab7d"},{"type":"PACKAGE","url":"https://github.com/cosmos/cosmos-sdk"},{"type":"WEB","url":"https://github.com/cosmos/cosmos-sdk/releases/tag/v0.47.9"},{"type":"WEB","url":"https://github.com/cosmos/cosmos-sdk/releases/tag/v0.50.4"}],"affected":[{"package":{"name":"github.com/cosmos/cosmos-sdk","ecosystem":"Go","purl":"pkg:golang/github.com/cosmos/cosmos-sdk"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.50.0"},{"fixed":"0.50.4"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 0.50.3","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/02/GHSA-2557-x9mg-76w8/GHSA-2557-x9mg-76w8.json"}},{"package":{"name":"github.com/cosmos/cosmos-sdk","ecosystem":"Go","purl":"pkg:golang/github.com/cosmos/cosmos-sdk"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.47.9"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 0.47.8","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/02/GHSA-2557-x9mg-76w8/GHSA-2557-x9mg-76w8.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}